Preparing method and application of corn stalk core hemicellulose-based hydrophobic temperature-sensitive gel

Abstract

The invention discloses a preparing method of corn stalk core hemicellulose-based hydrophobic temperature-sensitive gel. The method includes the steps of peeling, grinding and screening air-dried corn stalk to obtain a qualified raw material, separating out hemicellulose in the qualified raw material through an alkali-assistant hot water extraction technology, grafting and copolymerizing N-isopropylacrylamide and phenyl methacrylate on a hemicellulose macromolecular chain through a water solution micelle polymerization method, and carrying out a cross-linking reaction with N,N-methylenebis acrylamide to obtain the corn stalk core hemicellulose-based hydrophobic temperature-sensitive hydrogel. The prepared gel is white and massive, has high adsorption capacity for chlorophenasic acid, pentachlorodiphenyl and 3,4-benzopyrene, can be repeatedly used without losing the adsorption efficiency by controlling adsorption and desorption effects through temperature, and belongs to an environment-friendly type hydrophobic organic pollutant temperature-control adsorption material.

Description

technical field [0001] The invention relates to a temperature-sensitive gel prepared by hemicellulose graft copolymerization hydrophobic modification based on corn stalks, which is used for the adsorption treatment of hydrophobic organic pollutants and belongs to the technical field of natural polymer modified materials. Background technique [0002] With the rapid development of my country's chemical industry, a large amount of industrial wastewater, especially persistent organic pollutants, is directly discharged into water bodies without treatment, leading to increasingly serious water environmental pollution and causing great harm to human health. Many organic pollutants, such as polycyclic aromatic hydrocarbons, aromatic compounds, polychlorinated biphenyls, etc., are hydrophobic, so these pollutants are also called hydrophobic organic pollutants (HOCs). Most HOCs have carcinogenic, teratogenic, and mutagenic effects, can accumulate in organisms, and eventually pose hea...

AI Technical Summary

Problems solved by technology

However, the application of corn stalks (also known as corn stalks) in the fiber industry has been severely limited due to the fact that most of the constituent cells are short, thin-walled, and fragile non-fibrous cells (or called miscellaneous cells). Reduced application value of corn stalks

Although a small part of stalks have been developed for feed processing or alcohol fermentation industry, but due to the constraints of its own characteristics and transformation technology, there is no large-scale industrial application.